Japanese Racecar Radiator cooled SLI Setup

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05-14-2006, 07:32 PM
[XC] MarioMaster

just get a seperate pc psu for powering the fans, make a switch to select the voltage you want
05-14-2006, 09:05 PM
Zenjirou

Quote:

Originally Posted by mindwreck

What in the name of all thats holy possessed you to want to use that many deltas on your radiator. your ears never did anything to hurt you

why not a undervolted car fan

hey mindwreck,

I've spent a month or so looking for car radiator fans. There were a couple of problems. Although 12V, they take many amps to start up. I would need seperate power supply as well as a DC PWM kit which I would have to solder myself. I was very close to going that path, buying a 100W Dc pwm and toyota Radiator Fan. But I would have to make a shroud with very large distance from fins, thus making big and bulky.

Also this rad requires very very little airflow to cool the water to ambient, thus 120mm's at silence are more than enough.

Shroud is possibly going to be made by Thrilla out of Aluminum. If not, then by me out of thin sheet metal. He is also making Tubing Pass through Piece which fits in rear 80mm fan, seperating tubing inside case from outgoing from case.

I have purchased that new Swiftech Chipset Block (forgot name) to add to this system.

On positive note, my cpu is burning in and is slowly reaching 3.2ghz, at 3.15 currently. Ram is stable at 300 2.5-3-3-8 :) Gpu at 701mhz (memory not oc'd yet)
05-14-2006, 09:48 PM
ReD.SkY

oy zen, get on msn or aim lol

gotta tell u something / ask u something
05-15-2006, 12:38 PM
LvMike

I would just wire all the fans up in serries. connection the red tail to the black tail of each fan thn hook it upto a pot on the 12V line. sould work well if im not mistaken.
05-15-2006, 12:46 PM
mtl_hed

Quote:

Originally Posted by LvMike

I would just wire all the fans up in serries. connection the red tail to the black tail of each fan thn hook it upto a pot on the 12V line. sould work well if im not mistaken.

I hope your either joking or not paying attention. All fans in SERIES?!?

This would result in like half a volt getting to each fan. They wouldn't even start up.

Put them in parrallel, run them at or slightly below their rated voltage. Too low is bad. Higher than rated is bad.:fact:
05-15-2006, 12:50 PM
eXa

you could combine parallel and series!
05-15-2006, 01:23 PM
mtl_hed

Quote:

Originally Posted by eXa

you could combine parallel and series!

With this many fans, thats quite possible. Save the $$$ over a fanbus.

Plus a potentiometer setup for that would either have to be DIY or $$$.

Most PC style fanbuses only support <20W per channel.
05-15-2006, 04:38 PM
Zenjirou

thanks guys.

series or parallel. 0.0
or does it not matter?
I think both are same except in series if one fan is dead, all are not receive power.

I plant do exactly that, connect them up and have the wire go through small opening in the shrourd and connect it to the tubing which flollows into the Rear of the Case.

I just need to find a Pot or PWM /Fan controller capable of so much current. I like those which have rear PCI slot external knob because using drive bay controler will not look tidy :p, so Can keep it fixd at a low speed in rear of case.
05-15-2006, 05:42 PM
mtl_hed

Quote:

Originally Posted by Zenjirou

thanks guys.

series or parallel. 0.0
or does it not matter?
I think both are same except in series if one fan is dead, all are not receive power.

I plant do exactly that, connect them up and have the wire go through small opening in the shrourd and connect it to the tubing which flollows into the Rear of the Case.

I just need to find a Pot or PWM /Fan controller capable of so much current. I like those which have rear PCI slot external knob because using drive bay controler will not look tidy :p, so Can keep it fixd at a low speed in rear of case.

A quick lesson in basic electronics:

let n be the number of devices you are to apply power to
let all n's have the same resistance
let Vt equal the total voltage of system, this would be your PSU or 12V going in
let Vn equal the voltage experienced by the devices n

IN SERIES: Vn = Vt / n
So the total voltage divided by the number of fans. 12 fans in series, each one would only get 1V and would not start.

In Parrallel Vn = Vt
All devices get the same voltage, each drawing the same amperage.

This applies ONLY if n are all the same.

For your fans, the suggestion was made that you can combine the set in series and parallel giving you a voltage lower than 12 but high enough to start the fan. Somewhere in the 7v to 10v range.
05-15-2006, 07:27 PM
slicey

Quote:

Originally Posted by Zenjirou

its same noise level as the other two iwaki md20's I have. I know for sure the 50z is quieter. The iwaki should make a low pitched Humm sound. Is it very very loud? (i hope its not insainly lound , meaning sometimes wrong with it...:(

BTW- After much debatorizing, I've decided on using (don't laugh :p ) 12 120mm Fans for my Radiator.

reason I decided on this is

1) Using 12" Fan would have an enormously large dead spot in the middle . To remedy this the fan would have to be quite far away from the fins, thus the shroud would be long and bulky.

2) The radiator is Rectangle and in addition to the dead spot large portions of the radiator would be without direct fannage, unless I used TWO 12" fans side by side

3) Using 12 120mm's allows fannage across the entire surface area as fans are in every section of the radiator

4) Automobile Radiator Fans would require both a seperate Means PSU, as well as a 12V DC motor PWN.

5) Its reasy to make a shroud for 120mm's; making one for Table top fan I previously used would require strange mounting.

I'm only scared of noise, but as I found out earlier, very little airflow was needed to maximize the radiators cooling capability for the heat load I applied.

The FPI is very large, probably close to the 17.5 of BI series. Its thickness is in between a BIP and BIX.

I was thinking 6 on one side 6 on the other in push and pull configuration. If not, other option is 10 fans on one side.

Just have to look for a good 120mm which is cheap (buing 10+)

check out allelectronics.com, they have some 6.75" fans. you could use 4 of them and have them drawing air through the rad. give about 10-15" of spacing and you would feel that air is being pulled through the fins over the entire surface area.
05-15-2006, 07:28 PM
mtl_hed

Quote:

Originally Posted by slicey

check out allelectronics.com, they have some 6.75" fans. you could use 4 of them and have them drawing air through the rad. give about 10-15" of spacing and you would feel that air is being pulled through the fins over the entire surface area.

he's already got his fans. Just needs to mount them and get/build a shroud.

@zen - lets see them mounted! Use zip ties if you haven't got a shroud yet. Its ghetto but it will work for testing/benching
05-16-2006, 01:27 PM
Zenjirou

thanks for the link slicey
http://www.allelectronics.com/images...ull/CF-244.jpg

These would be perfect, being only 200cfm's they would be silent. too bad they are 24V fans.

I think I'im getting impatient :p
I'm going to remove the temporary cooling box and connect the koyo as it is right now and use huge fan with cardboard shroud until real should is made.
I do knot know if changing the radiator can help overclocks, as hardware fails/passes in superPI within a few seconds, too fast for water too heat up. Eitherway Overclcoks seem to be at its maximum at 3.15 on opty 146 and 703Mhz on 7900Gtx
05-16-2006, 03:37 PM
Zenjirou

Quote:

Originally Posted by KaptCrunch

just get a 24v psu while ur there

Thanks KaptCrunch

But I cannot change fans now since already purchased. that Powersupply is battery charger and has not enough amps. If I were to use 5-10 24V fans, a means powersupply would be necesary.
05-16-2006, 03:44 PM
creidiki

Do the shroud already, ya lazy bum :p:

I wanna see "Zenjirou's Wall Of Fans™" ^_^
05-16-2006, 04:56 PM
shadowing

Quote:

Originally Posted by creidiki

Do the shroud already, ya lazy bum :p:

I wanna see "Zenjirou's Wall Of Fans™" ^_^

Only problem with getting a shroud is the fact he can't find most people that can make it...
05-16-2006, 05:01 PM
creidiki

Cardboard ftw! ;)
05-16-2006, 06:01 PM
Zenjirou

http://surfinchemical.com/Zenjirou/t...v2/radfan1.jpg
It will do.. for now :p
05-16-2006, 06:07 PM
creidiki

You win: 15 GhettoPoints™
05-16-2006, 06:10 PM
Reinvented

Nice shroud.
05-17-2006, 03:18 AM
-aDaM^

Quote:

Originally Posted by creidiki

You win: 15 GhettoPoints™

agreed, lol! :slapass:
05-17-2006, 07:56 PM
krylon

at least he has a shroud now!
05-18-2006, 11:25 AM
Mat347

Quote:

Originally Posted by Zenjirou

thanks for the link slicey
http://www.allelectronics.com/images...ull/CF-244.jpg

These would be perfect, being only 200cfm's they would be silent. too bad they are 24V fans.

I have one of these fans, they work well @12V. I used it with my old setup using an A/C evaporator. You'll probably want some mounting cushions as the large motor creates a pulsing vibration, almost a ticking.
05-18-2006, 11:53 AM
lross78550

1 Attachment(s)

I repeat the best powersupply option is one of these they are great completly silent and can handle the current and vary the voltage. they are also small and fairly inexpensive.

The VS12 is rated to 12 amps at 2-15 volts and cost $94.00

The VS20 is rated to 20 amps at 2-15 volts and cost $116.00
05-18-2006, 02:10 PM
andersson.j

Quote:

Originally Posted by lross78550

I repeat the best powersupply option is one of these they are great completly silent and can handle the current and vary the voltage. they are also small and fairly inexpensive.

The VS12 is rated to 12 amps at 2-15 volts and cost $94.00

The VS20 is rated to 20 amps at 2-15 volts and cost $116.00

Maybe it's just the picture but that psu looks like it's at least four times as big as a regular psu? And 20 A for 116$ sounds kinda expensive to me!

http://img364.imageshack.us/img364/4...s9400gr9qn.jpg
I brought my Maas SPS-9400 3-15.4V 40A, used for under $100, it's small enough to fit in front of my regular PSU in the lower area of my P180 (with some minor modifications.)

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